Combined blind and ventilator



(No Model.)

H. P. EGBDAL. COMBINED BLIND AND VBNTILATOR. No. 514,918.

Patented Feb. 20, 1894.

wwmwua UNTTED STATES PATENT @rrrca.

HANS P. EGEDAL, OF THOR, IOWA.

COMBINED BLIND AND VENTILATOR.

SPECIFICATION forming part of Letters Patent No. 514,918, dated February20, 1894.

Application filed May 28. 1892- Serial No. 434.718- (No model.)

To all whom if; may concern:

Be it knownthat I, HANS P. EGEDAL, a citizen of the United States,residing at Thor, in the county of Humboldt and State of Iowa,haveinvented certain new and useful Improvements in a Combined Blind andVentilator, which are fully set forth in the following specification,reference being had to the accompanying drawings, forming a part hereof,and in Which- Figure 1 shows a transverse vertical section of myimproved combined blind and ventilator, with its slats open. Fig. 2shows a mechanism about like Fig. l with its slats in a closedcondition. Fig. 3 shows the upper end of my said device in the opencondition as seen from the interior.

Like letters refer 'to like parts.

The object of my invention is to produce a ventilating slat forshutters, but more particularly for cupolas of large buildings,belfreys, towers, elevators, barns, stables, &c., where large currentsof air are usually wanted and which shall be self closing underestablished conditions and reg ulably adjustable, also more securelyproof against the entrance of snow or wind when closed than those now inuse, and, to attain said desirable ends I co nstruct my said new andimproved device in substantially the following manner, namely: Near oneedge of a casing 0 are holes in which turn the bearings 19 of slats b.The journals or bearings of said slats are at the lower edge of the endsof the slats, and on the outside of said slats, against'the inner sideof the easing 0 is attached a notched strip'a which covers the joints atthe ends of the slats and fits snugly against them when they are closed.Above the journals is a groove b from end to end of each slat, and atthe upper edge and opposite and outer side of each slat is a bead b fromend to end of each slat which fits into said channel I) of the next slatabove it. The outer, or free longitudinal edges of said slats are wiredto a rod 0 in the usual manner and at the upper end of the casing 0 is afixed slat b with a channel to receive the bead b of the slat below it.To said rod cis attached a cord d which passes up and over a pulley ethence down to a weight f having an arm the outer end of which is hingedat f, to some suitable support, said arm being long enough to permit therequired motion to the slats. To said arm, or weight is attached abrace, hinged at 9 providedwith aweight g at the end of a rigid armprojecting at right angles from said brace, as shown. said brace g restson the end of a cam-like spur j on the shaft h and to said shaft h isattached a rigid and adjustably Weighted lever projecting horizontally,when in its lowest position, where it rests on some suitable support orstop, as 1), and,'projecting vertically downward from said shaft is avane h in a plane parallel to the plane of said casing o, as shown. Tosaid rod 0 is also attached a cord is which descends to a point inconvenient reach tofurther manipulate said slats.

The operation of my said device is substantially as follows, namely:When the slats are The lower end of to be opened the cord It is pulleddown, or i when it is desired to fasten the slats permanently the lowerend of said cord is fastened to a pin Z. When, however, it is desired toallow the slats to close automatically at any desired force of wind, theweight It isadjusted on its lever to yield at that point, then the vaneh moves inward, as shown by the broken lines in Fig. 1. This motionturns the shaft with its cam or spurj so as to release from it the braceg which then falls into the position shown in Fig. 2 and thus causes theslats to close as there shown. When the force of the wind has decreasedbelow the designated force the cam j will again stand as now shown,ready to receive the brace g. All that is therefore required is to pullthe cord is and thus open the slats and raise the weight f, each to itsfull exten this will cause the end of the brace g to move into its placeon the cam j. If said slats are to be only partly open the cord is ispulled down and fastened at the desired point, thus either moving theclosed slats to such position or by such fastening so securing the slatsfrom fully closing after the force of the wind has risen so as toactuate the mechanism adjusted to any desired force and thus trip thebrace g from its support.

What I claimis- 1. The combination with connected and journaled slats,of an oscillating weight connected to said slats and to ahinged brace,an

3. The combination with connected slats turnable on an axis, of a cordand fastening 15 mechanism therefor operating said slats in onedirection and a second cord attached at one end to said slats and at itsother end to a hinged weight connected to a hinged brace a weighted vaneand stop thereon for said 20 brace to operate substantially asspecified.

HANS P. EGE DAL.

Witnesses:

WM. ZIMMERMAN, ANTON FONGNER.

